/Engine/Source/Runtime/AIModule/Classes/Perception/AIPerceptionSystem.h
Iterates over all pawns and registeres them as a source for sense indicated by SenseID. Note that this will be performed only for senses that request that (seeUAISense.bAutoRegisterAllPawnsAsSources).
virtual void RegisterAllPawnsAsSourcesForSense ( FAISenseID SenseID )